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NITED STATES PATENT OFmcE,

WILLIAM B. ALLMAN, OF INDIANAPOLIS, INDIANA.

ROOFING COMPOSITION.

SPECIFICATIONforming part of Letters Patent No. 246,359, dated August30, 1881.

Application filed February 14, 1881. (N0 specimens.)

To all whom c't may concern:

Be it known that I, WILLIAM B. ALLMAN, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented a new and useful Composition of Matter to be used forRoofing, of which the following is a specification.

My composition consists of the following ingredients, combined in aboutthe proportions stated, viz: Common coal-tar, seventy-five pounds,pitch, twenty-five pounds; ground slate, three hundred pounds plasterershair, ten pounds. These ingredients are thoroughly mixed in thefollowing manner, to wit: The coal-tar and pitch are melted together inan iron tank or kettle surrounded with boiling water in another kettleor tank, until they are well mixed and become perfectly liquid; then theslate-flour is thoroughly mingled by agitation therewith until the massbecomes too thick to run; then the hair is stirred into the mass, andthe whole is thoroughly mixed.

In puttingon roofing of the above-described composition I prefer to useManila cloth as the base, which is tacked or otherwise secured to theroof-sheeting, and the composition is applied to the manila at a boilingtemperature, which, upon cooling, forms an even coatfrom cracking.

in g, which is elastic, and not liable to crack or run, even on steeproofs, and is fire-proof. The plasterers hair adds greatly to itsstrength and durability by preventing the compound The pitch and tarunite to form a body which absorbs large quantities of the slate-flour.The pitch gives elasticity to the mass, and the slate-flour effectuallydestroys the combustible nature of the compound and renders the roofingfire-proof.

What I claim as new, and desire to secure by Letters Patent, is-

The herein-described composition of matter to be used for roofingpurposes, consisting of common coal-tar, pitch, slate-flour, andplasterers hair, in about the proportions specified, the coal-tar andpitch being first melted and mixed, then the slate-flour and plasterershair are added, and the whole mass thoroughly mixed, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM B. ALLMAN.

Witnesses E. 0. FRINK, G. H. BENNETT.

